The Seasonic Prime TX-1000 wins in 3 out of 7 comparable specs. Its biggest advantage is Efficiency (50% better).
RM850x wins in 1 spec (MSRP: 46% better).
Recommendation
Choose Prime TX-1000 if you want the best overall performance — especially efficiency.
Choose RM850x if msrp matters more to you.
| Spec | CorsairRM850x | SeasonicPrime TX-1000 |
|---|---|---|
| Power | ||
| Wattage | 850W | 1000W+18% |
| Efficiency | 80+ Gold | 80+ Titanium+50% |
| ATX Version | ATX 2.0 | ATX 2.0 |
| Design | ||
| Modular | Full | Full |
| Fan Size | 140 mm | 135 mm |
| Depth | 160 mm | 170 mm |
| Connectors | ||
| SATA Connectors | N/A | 14 |
| PCIe Connectors | N/A | 8 |
| Features | ||
| 12VHPWR Connector | No | No |
| Warranty | 10 | 12+20% |
| Price | ||
| MSRP | $140−46% | $260 |
| Release Date | Sep 2021 | Oct 2019 |
